Pearl Harbor​ Operation Z was the code name that the Japanese used for the attack on Pearl Harbor. This was a unannouced military attack performed by the Japanese navy on U.S.A. navel base on the morning of December 7, 1941. The attack was meant to keep U.S.A out of the was and to destroy most of the battle ships. This plan back fired when President Roosevelt announced the next day that we were going to enter the war. Japan sent a total of 353 aircraft launched from six aircraft carriers in two aerial waves.
Operation Z was the code name that the Japanese used for the attack on Pearl Harbor. This was a unannouced military attack performed by the Japanese navy on U.S.A. navel base on the morning of December 7, 1941. The attack was meant to keep U.S.A out of the was and to destroy most of the battle ships. This plan back fired when President Roosevelt announced the next day that we were going to enter the war. Japan sent a total of 353 aircraft launched from six aircraft carriers in two aerial waves.